NO DIAL TONE ON HANDSET

SOURCE: Speaker phone light continually blinks

The blinking light on the speaker button means the forward when busy is on. To cancel it- With the handset on-hook dial #12.
Then press your own station number. Then dial # again. The speaker button should stop flickering.
Note: If the SPK button continues to flicker, Forward all is activated. It is the same process as above but use #11 instead of #12

SOURCE: philips dect 521/525 - 3 year old phone - No dialling tone on one handset

I had the same problem and my hubby managed to reset the phone by simply unplugging it from the electical network. Just wait for few minutes (the date goes back to 1 Jan 2005), then plug it again and try to dial a number. It should work.

SOURCE: Panasonic KX-T7433

These phones are digital proprietary telephones which means that they only work on panasonic telephone systems and not on normal analog lines. If you have a panasonic system the correct way is to plug the line into the " To Main Unit ", the handset into " Handset/Headset" and a normal analog phone into " To Tel ". If the wiring on the line jack was not done digitally the phone will also not work

Testimonial: "Thanks Heaps Buddy"

SOURCE: Phone (base and both handsets) rings once, then

This is likely caused by a trouble from the service provider. It is caused by a partial short on the phone line. The service provider can usually test the line remotely when you call the trouble in. Occasionally this problem is caused by faulty equipment(phone, answer machine, modem, etc.), bad line cord, bad outlet or bad building wiring. Inside the outside telephone interface box there is a modular test jack that has a short line cord connected. Remove this line cord and connect a standard telephone to test the phone line. Make a call to your number, if the problem occurs with the phone connected to the test jack, then the problem is with the service provider. If the problem does not occur with the phone connected to the test jack then the problem is in the building wiring, outlets, line cords or devices connected. Use a process of elimination to determine where the problem is. Example: disconnect all phones and devices and line cords, make test call with one phone connected, if problem continues inspect outlets and wiring.

Testimonial: "Our phone actually started working correctly again, so I think you were correct in saying it was the service provider. Thank you for your help!"

SOURCE: Handset displays "Line in Use" no dialing tone and

I can't get dial tone either. Let me know if you find a solution please.